My estimates:
$75 Super Puzzle Fighter X - Green
$200? Battle Circuit - Grey
$50 Vampire Hunter - Green
$75 Cyberbots - Green
$75 19XX - Green
Prices on Green boards are based on sourcing them from Yahoo Japan Auctions, not shops or ebay auctions. The Grey Battle Circuit is sort of a crap-shoot because it's a rare title, regardless or region. Today's market is super crazy. On a given day, one of those on ebay might fetch 2x the "normal" price. I wish I would have fleshed out my CPS2 stuff back when I first got into arcade collecting. I remember $20 CPS2 games on ebay. $100 would have seemed "crazy." Since then I've pretty much given up on getting games in a particular color (or condition, for that matter, lol) and just focused on getting titles I'm missing. I've actually kept a spreadsheet of sources, prices paid, condition, etc. and when I'm done with the collection I'll do a nice writeup of my experiences piecing together a complete CPS2 collection.
I don't know if I have any dupes of the titles you listed (possibly a Cyberbots?), but I've got a bunch of extras I should probably get rid of to clear out my already crowded office. I'll try to get to that later this summer. I'll post here before ebay or anywhere else.
-ud